Also, make sure the downloaded macOS installer file is in “Applications” folder.

At this point, ensure you have inserted the formatted USB drive, let’s say the name of the USB volume is “Boot Disk”.Simply quit the installer without starting the installation process. Creating USB Installer with createinstallmedia CommandĪfter downloading, the installer will automatically ask you to install macOS Mojave.

This will start downloading the installer file to your “Applications” folder. In our example, we have FAT32 file system which is only compatible on Windows PC. Hence, we need to erase and format the USB to be compatible with your Mac. You can view the current file system of the USB drive. Press “Command +Spacebar” to access Spotlight Search, then type “Disk Utility”. Format USB Flash Drive to Apple File Systemįirst, plug in your USB drive. Remember to copy and backup the USB since you need to delete the entire content for creating the bootable drive. So, ensure to have at least 32GB or greater storage space on your USB drive. Also the process needs sufficient storage space on your USB. The macOS installer file is larger with approximate size of 6 to 10GB depending upon the version. Otherwise, you should have another Mac for creating a bootable USB. If you are not able to login to your Mac, then you can use Time Machine backup disk. USB drive with sufficient storage space.Let’s begin with the obvious question here what are the basic requirements for creating bootable USB for Mac? How to Create Bootable USB Drive for Mac? In most situations, booting from USB drive can help to fix the problems especially those related to your primary hard disk. You have deleted some system files wrongly.Mac runs very slow with sufficient storage.Corrupted system files and Mac crashes unexpectedly.There are many occasions you may have trouble with your Mac. Why You Need to Boot from External Drive? If you are also using PC, learn how to create bootable flash drive for Windows PC. You’re about to find out how to boot your Mac up directly from external storage, specifically flash storage or a USB flash drive. But let’s delve into something more specific. In addition to this, macOS users also have an option of picking a disk to boot the operating system from. Aside from using the built-in startup option, you can also boot into Verbose, Safe, and Target Disk modes.

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